Detector for warp stop-motions.



JOHN P. WEBBER, OF LAWRENCE MASSACHUSETTS, ASSIGNOR TO DRAPERl COMPANY, Ol"

PATE

` HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE. Y'

DETECTOR FOR WRP STOP-MOTIUNS.

No. leeoffee.

To all whom it may concern: Y

Be it known that l, JOHN P. WEBBE-n, a citizen of tlie United States, and resident of Lawrence, county of Essex, State of Massachusetts, have invented an Improvement in Detectors for'Vifar Stop-lilotions, of which Specification of Letters Patent, Application filed April 29, 1907. SeralvNo. 389,190.

the following description, in connection with the accompanying drawing, is a specificatioinlilre letters on the drawingr representing like parts.

This invention relates to detectors for Warp-stop-ino'tions of the type wherein a series of longitudinally movable detectors are maintained in inoperative position by nor-- mal warp-threads, a detector being permit.- ted to niove into operative or active position by failure or undue slackness ot its warptliread. ln suoli apparatus thevdetectors are frequently arranged 1n series and have each e longitudinal,-elongated openingr or slot through which 1s extended n guide or support, relatively'to which the detectors are movable vertically, the warp-threzuis pessing through the openings or slots between their closed upper ends and the top of the guide or support. l'lf'hen using' detectors or drop devices ol lthis character on worsted looms it. has been l'ound that when the take-up was let buck, and the wnri loosened lor the weaver to piek out u had platee in the cloth. the shelling ol the warp-llu'ends b v the weaver in pielrinpr out such a bad iluee caused the detectors to juni iup and down on the guide or supportingA liar. Such jumping' ol' the detertors brought the upper ends ol' their slots down upon the top of the `guide, pinching or nipping the warp-tln'ealh` and cuttingr them between the two herd. edges, resultingr in nlueh :uuioyanee and dela)v and loss ol .produetion- Ylho present invention has lor its object the production olI a novel :uid simple l'orni of doteetor or drop-device t.e coin iletely olwlulillu eutting'olthe wurp tlrim s by the jump-- inn' nel'iou referred to.

l"ij,fliri"| i :l :dile i'li\ :il ion ol udelel'toi' einliod \finf;j one l'orui ol' the present invention: Fie'. l is :i vien' olone olf the novi-l delectors mounted ou its uuidil or support, in noriunl position," und in doti- 5 lilies :t deteelor is l i l l )Patented June re, ieee.

shown as in abnormal the use etsueh time of In practice the detect made of thin, flat sheet-metal, ofthe requisite length and width, herein shown as substan tially rectangular in outline, with straight longitudinal edges, each detecter having an elongated longitudinal epeningor sletl l?, open at its lower end and having parallel sides 3. v

in eecordaneewith 4the present invention the slot or opening terminates et its Closed upper end in ashort, straight prolongation el, symmetrically disposed With rela-tion to the openinge, that i's, centrally located between the parallel sides 3 thereof. The said sides are incurved at their upper ends et 5to? present shoulders :it thel junction of the iride?,- slot 2 and the narrow prolongation l thereof, the entrance to the latter being between the shoulders, as clearly shown in Fig. 1, the sides of the prolongation being purellel to enoh other and to the sides S o1' the wide slot.

As shown in Fig. the detertors :ire strung on the warp-threads e: whieh pass through the. prolongutions 4, tl 2 loosely reeeivingztnd embracing' the upright guide or supporting bar 6.

Normal erp-threiuls maint-ain the detertors elevated, ns shown in t'ull lines. Fig. 2, nnd il' the \\'urp-thre.ids :ui- `lhiehened so thut tht` detectors run desren-,l lo the innxiiuuiu :uuount the shoulders engage the top et the bur (i, while the urli-thread reninins tree und unpinehtd in the prolongation 5, us shown :it fuX, Fig. L3.

No matter hon inueh u deterlor muy be nutde to juiup up und donn its desi-ent is limited b engngenient ol' the shouldersy .-'i with the supporting; bnr, und e elezu' :ind open worp-revolving opening' will :it suoli times bo :dna-lys lprovided by the prolongution ul. so hul there pruttitzdlv no possi. l ilit oll the ilu'end being enughl und out.

llnviuu lolly described iu invent ion. nhnt l eluiiu :is nen' und desire to sel'uro by liet ters llntent is:Y Y

. is nn urtiele oll iuuiud'zu'lure, u thin. lint sheetunotnl n'zirp-slop-inotion deterliu' huriupy struigrht longitudiunl ede-"es l'i'oiu end tu position, illustrating 1e nniin openingiu or slot the novel structure. ors l are preferably 'w end-l and provided with an elongated slots name to this specification, in thepresenee'of eden at its lowerhend and having parallel two subscribing witnesses. s1' es inouryed et -t eir upner en s at the entrance to a narrow, straight and central prol JOHN P' WEBBER longationof the slot, sind prolongation also Witnesses:

having parallel sides. THEOPHILUB COUPE, In testimony whereof, I- Ahave signed my JOSEPH E. KENNY. 

